TITLE

Effect of driving frequency on excitation of turbulence in a kinetic plasma

AUTHOR(S)
Parashar, T. N.; Servidio, S.; Shay, M. A.; Breech, B.; Matthaeus, W. H.
PUB. DATE
September 2011
SOURCE
Physics of Plasmas;Sep2011, Vol. 18 Issue 9, p092302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The effect of driving frequency on the efficiency of turbulence generation through magnetic forcing is studied using kinetic hybrid simulations with fully kinetic ions and fluid electrons. The efficiency of driving is quantified by examining the energy input into magnetic field as well as the thermal energy for various driving frequencies. The driving is efficient in exciting turbulence and heating the plasma when the time period of the driving is larger than the nonlinear time of the system. For driving at faster time scales, the energy input is weak and the steady state energy is much lower. The heating of the plasma is correlated with intermittent properties of the magnetic field, which are manifested as non-Gaussian statistics. Implications for turbulence in solar corona are discussed.
ACCESSION #
66184770

 

Related Articles

  • On the origin of turbulent fields in interplanetary plasmas. Lazar, M. // AIP Conference Proceedings;9/8/2008, Vol. 1043 Issue 1, p318 

    Solar coronal mass ejections are prominent example of interpenetrating particle streams with different properties: densities, speeds, temperature and composition. Such counterstreaming plasmas are quickly unstable leading to the excitation of the electrostatic and electromagnetic instabilities....

  • Discrete particle noise in particle-in-cell simulations of plasma microturbulence. Nevins, W. M.; Hammett, G. W.; Dimits, A. M.; Dorland, W.; Shumaker, D. E. // Physics of Plasmas;Dec2005, Vol. 12 Issue 12, p122305 

    Recent gyrokinetic simulations of electron temperature gradient (ETG) turbulence with the global particle-in-cell (PIC) code GTC [Z. Lin et al., Proceedings of the 20th Fusion Energy Conference, Vilamoura, Portugal, 2004 (IAEA, Vienna, 2005)] yielded different results from earlier flux-tube...

  • Wavenumber spectrum of whistler turbulence: Particle-in-cell simulation. Saito, S.; Gary, S. Peter; Narita, Y. // Physics of Plasmas;Dec2010, Vol. 17 Issue 12, p122316 

    The forward cascade of decaying whistler turbulence is studied in low beta plasma to understand essential properties of the energy spectrum at electron scales, by using a two-dimensional electromagnetic particle-in-cell (PIC) simulation. This simulation demonstrates turbulence in which the...

  • Particle-in-cell simulation with Vlasov ions and drift kinetic electrons. Chen, Yang; Parker, Scott E. // Physics of Plasmas;May2009, Vol. 16 Issue 5, p052305 

    There are certain limitations in using gyrokinetic ions for simulations of turbulent transport in tokamak plasmas. Applications where Vlasov ions might be more appropriate include the electron temperature gradient driven turbulence, edge turbulence with steep density gradient, and magnetic...

  • On the relevance of magnetohydrodynamic pumping in solar coronal loop simulation experiments. Tenfelde, J.; Kempkes, P.; Mackel, F.; Ridder, S.; Stein, H.; Tacke, T.; Soltwisch, H. // Physics of Plasmas;Jul2012, Vol. 19 Issue 7, p072513 

    A magnetohydrodynamic pumping mechanism was proposed by Bellan [Phys. Plasmas 10, 1999 (2003)] to explain the formation of highly collimated plasma-filled magnetic flux tubes in certain solar coronal loop simulation experiments. In this paper, measurements on such an experiment are compared to...

  • Kinetic simulations of turbulent fusion plasmas. Idomura, Y.; Watanabe, T.-H.; Sugama, H. // AIP Conference Proceedings;5/14/2008, Vol. 1013 Issue 1, p270 

    In this paper, advances in kinetic simulations of turbulent fusion plasmas are reviewed by focusing on physical and numerical models used in five dimensional (5D) gyrokinetic simulations. Theoretical frameworks of physical models from the 6D Vlasov equation to the 5D gyrokinetic equation are...

  • Synergistic cross-scale coupling of turbulence in a tokamak plasma. Howard, N. T.; Holland, C.; White, A. E.; Greenwald, M.; Candy, J. // Physics of Plasmas;2014, Vol. 21 Issue 11, p1 

    For the first time, nonlinear gyrokinetic simulations spanning both the ion and electron spatiotemporal scales have been performed with realistic electron mass ratio ((mD/me)1/2 = 60.0), realis-tic geometry, and all experimental inputs, demonstrating the coexistence and synergy of ion (kθps ~...

  • Quantum-molecular-dynamics simulations of liquid metals and highly degenerate plasmas. Theilhaber, Joachim // Physics of Fluids B: Plasma Physics;Jul92, Vol. 4 Issue 7, p2044 

    A numerical scheme based on time-dependent density-functional theory, for the simulation of systems of classical ions and quantum mechanical electrons, has been developed with the aim of modeling simple metals or highly degenerate plasmas from first principles. The electrons are represented by a...

  • The effect of collisional dissipation on the radial profiles of current driven by the lower-hybrid waves. Dehui Li; Guangli Kuang; Shaojie Wang // Physics of Plasmas;Jun2008, Vol. 15 Issue 6, p062504 

    A simulation of the collisional dissipation of fast electrons has been conducted in lower-hybrid-current drive (LHCD) tokamak plasmas. The simulation results show that the dissipation of fast electrons will counteract the effect of radial diffusion to some extent, thereby making the LHCD current...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics